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Le 18-02-12 à 16:03, Mike Horvath a écrit :
> On 2/12/2018 2:02 PM, Alain wrote:
>> Le 18-02-10 à 22:36, Mike Horvath a écrit :
>>> I've been reading this
>>>
>>> https://en.wikipedia.org/wiki/Miniature_faking
>>>
>>> and have been wondering how to achieve the effect in POV-Ray.
>>> Obviously, there is no true scale in POV-Ray, so there's no need to
>>> "fake" the effect. But I don't know how to construct the correct camera.
>>>
>>> Any ideas?
>>>
>>>
>>> Mike
>>
>> Use a larger aperture. Something like
>> vlength(Camera_Location, Focal_point)/4
>>
>> If that's not enough, use a smaller divisor.
>
> Yeah, I got it working. But it doesn't look as good in POV-Ray as it
> does in photography. I'll post some test renders soon.
>
>
> MIke
As the ratio aperture/focal_length increase, you also need more samples.
Otherwise, the image will get very noisy.
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Can you
a) mimic and actual camera lens with glass / ior?
b) look through a clear sheet that has a perturbation or normal that gets
progressively stronger toward the edges?
c) look though a partially transparent image map of the scene that somehow gets
rotated a little further the farther out toward the edge you get?
d) otherwise use overlapping image maps to imitate the photographic "circle of
confusion"?
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On 2/13/2018 8:54 PM, Bald Eagle wrote:
> Can you
>
> a) mimic and actual camera lens with glass / ior?
>
> b) look through a clear sheet that has a perturbation or normal that gets
> progressively stronger toward the edges?
>
> c) look though a partially transparent image map of the scene that somehow gets
> rotated a little further the farther out toward the edge you get?
>
> d) otherwise use overlapping image maps to imitate the photographic "circle of
> confusion"?
>
>
>
I don't know how to do any of these things. It would probably be easier
to just do post-processing in Photoshop.
Mike
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On 2/13/2018 11:39 PM, Mike Horvath wrote:
> On 2/13/2018 8:54 PM, Bald Eagle wrote:
>> Can you
>>
>> a) mimic and actual camera lens with glass / ior?
>>
>> b) look through a clear sheet that has a perturbation or normal that gets
>> progressively stronger toward the edges?
>>
>> c) look though a partially transparent image map of the scene that
>> somehow gets
>> rotated a little further the farther out toward the edge you get?
>>
>> d) otherwise use overlapping image maps to imitate the photographic
>> "circle of
>> confusion"?
>>
>>
>>
>
> I don't know how to do any of these things. It would probably be easier
> to just do post-processing in Photoshop.
>
>
>
> Mike
I forgot about the fact that my scenes have some tall objects, and the
Photoshop post-processing doesn't work properly in cases like this.
Will a transparent glass really make much of a difference?
Mike
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Le 18-02-13 à 20:54, Bald Eagle a écrit :
> Can you
>
> a) mimic and actual camera lens with glass / ior?
Yes. Tou place an object shaped as the desired lense with the desired
ior just in front of the camera. You can also add some dispersion.
This have been actually used.
>
> b) look through a clear sheet that has a perturbation or normal that gets
> progressively stronger toward the edges?
You can use camera perturbation or use some actual transparent object
with a perturbed normal or some actual displacement.
Then, it's just a question of modulating the pattern.
There are some samples scenes that show how it can be done.
>
> c) look though a partially transparent image map of the scene that somehow gets
> rotated a little further the farther out toward the edge you get?
>
> d) otherwise use overlapping image maps to imitate the photographic "circle of
> confusion"?
>
>
>
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"Kenneth" <kdw### [at] gmail com> wrote:
I just noticed a dumb error I made-- some switched vector coordinates:
>
> Now, with a more complicated camera position:
> original camera position: <3,13,-9>
> original focal point: <0,0,0>
>
> With scale 2:
> new camera position: <...? ...> (I'm too lazy to figure it out)
> new focal_point set to: <-13,-3,9>
>
With scale 2, it should be...
new camera position: <...? ...> (I'm too lazy to figure it out)
new focal_point set to: <-3,-13,9> // the CORRECT vector
I hope my mistake didn't totally confuse the idea...
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On 2/13/2018 8:54 PM, Bald Eagle wrote:
> Can you
>
> a) mimic and actual camera lens with glass / ior?
>
I'm surprised no one has created a library of simulated cameras/lenses
already. POV-Ray has been around for, what, two decades?
Mike
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On 21-2-2018 12:28, Mike Horvath wrote:
> On 2/13/2018 8:54 PM, Bald Eagle wrote:
>> Can you
>>
>> a) mimic and actual camera lens with glass / ior?
>>
>
> I'm surprised no one has created a library of simulated cameras/lenses
> already. POV-Ray has been around for, what, two decades?
>
>
Edouard Poor...
--
Thomas
Post a reply to this message
Attachments:
Download 'edouard poor - 35mm camera.zip' (51 KB)
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